Method and device for sending digital television signal data based on alternative text combination

A technology of a digital TV signal and data transmission method, which is applied to secure communication devices, encryption devices with shift registers/memory, digital transmission systems, etc. The effect of realizing fine control, improving security and information security

Active Publication Date: 2021-10-19
深圳佳力拓科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the key of this traditional scheme has the problem of key security, and it is difficult to carry out fine-grained control of permissions.

Method used

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  • Method and device for sending digital television signal data based on alternative text combination
  • Method and device for sending digital television signal data based on alternative text combination
  • Method and device for sending digital television signal data based on alternative text combination

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Embodiment Construction

[0049] In order to make the purpose, technical solution and advantages of the present application clearer, the present application will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present application, and are not intended to limit the present application.

[0050] refer to figure 1 , the embodiment of the present application provides a digital television signal data transmission method based on substitution text combination, which is applied to a digital television signal transmission end, including:

[0051] S1. Obtain preset digital TV signal data, and call a preset key pair; wherein, the key pair includes a public key and a private key;

[0052] S2. Using the public key to encrypt the digital TV signal data to obtain encrypted data, send the encrypted data to the preset n digital TV signal receiving ends, and judge the re...

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PUM

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Abstract

The invention discloses a method and a device for sending digital television signal data based on alternative text combination. The method comprises the steps: acquiring preset digital television signal data, and calling a preset key pair; performing encryption processing to obtain encrypted data, and sending the encrypted data; if signal receiving ends are all authorized terminals, acquiring n feature data sets; respectively carrying out Hash calculation to obtain n Hash values; performing discovery processing on coincident character fields to obtain n coincident character fields corresponding to the n hash values respectively; performing n-batch splitting processing on the private key to correspondingly obtain n private key section combinations; performing alternative text combination generation processing to generate n alternative text combinations corresponding to the n private key section combinations; and sending the ith splitting method, the ith alternative text combination and the ith interception method to the ith digital television signal receiving end, thereby improving the security of the secret key and the information security and realizing the fine control of the authority.

Description

technical field [0001] This application relates to the field of digital television, in particular to a method and device for transmitting digital television signal data based on alternative text combination. Background technique [0002] Digital TV programs include some paid programs, which can only be watched after being authorized by the digital TV signal sender. The authorization method of this paid program can be realized in the following way: encrypt the TV program to obtain the cipher text, and then transmit the cipher text to the digital TV signal receiving end, if the payment is made, then send the key to the digital TV signal receiving end, thereby The receiving end of the digital TV signal can decrypt and play paid programs. However, the key of this traditional scheme has the problem of key security, and it is difficult to carry out fine-grained control of permissions. Contents of the invention [0003] This application proposes a method for sending digital TV ...

Claims

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Application Information

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IPC IPC(8): H04N21/2347H04L29/06H04L9/06
CPCH04N21/2347H04L63/0442H04L9/0643
Inventor 李海东廖佳秋
Owner 深圳佳力拓科技有限公司
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